WordPress Core Developing with Xdebug + VSCode + WSL 2

docker-compose.yml

  ##
  # The PHPUnit container.
  ##
  phpunit:
    build:
      context: ./tools/local-env
      dockerfile: Dockerfile-phpunit

Dockerfile-phpunit

FROM wordpressdevelop/phpunit:${LOCAL_PHPUNIT:-latest}

# install xdebug
RUN pecl install -f xdebug \
	&& echo "zend_extension=$(find /usr/local/lib/php/extensions/ -name xdebug.so)" > /usr/local/etc/php/conf.d/xdebug.ini;

launch.json

{
	// Use IntelliSense to learn about possible attributes.
	// Hover to view descriptions of existing attributes.
	// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
	"version": "0.2.0",
	"configurations": [
		{
			"name": "Listen for XDebug",
			"type": "php",
			"request": "launch",
			"port": 9000,
			"hostname": "localhost",
			"pathMappings": {
				"/var/www": "${workspaceRoot}"
			},
			"xdebugSettings": {
				"max_data": -1
			}
		}
	]
}

phpunit-config.ini

xdebug.mode=debug
xdebug.client_host=host.docker.internal
xdebug.client_port=9000
xdebug.discover_client_host=true
xdebug.start_with_request=yes